Concrete-form clamp



. Oct. 16, 1928. 1,687,977

H. FORD CONCRETE FORM CLAMP Filed Jne 928 2 Sheets-Sheet l gwwnkor lib/"ace Far Oct. 16, 1928.

H. FORD Y CONCRETE FORM CLAMP eet Filed June 12, 1928 gmwntoa b o /"ace F0 r1 beams, columns and pilasters, and has for-an V,

Patented Oct. 16,1928.

UNITED STATES PATENT OFFICE.

HORACE I031), 01* BALTIMORE, MARYLAND, ssrenon or ONE-HALF ro CHARLES L. sTocxHAusEn, or BALTIMORE, MARYLAND. r

CONCBETEFOR1YI CLAMP.

* Application f led June 12,

This invention relates to concrete form clamps and more part;cularly to aclamping structure of general use in the formation of important object thereof the improvement of the structure shown in my co-pending application, Serial No. 248,47 5, filed January 21, 1928, for Concrete form clamps;

More specifically, it is an object of the present invention to improve the structure of the form clamp shown in the application above identified as to the construction of the side members employed therein, so as to enab'fe these side members to be adjusted to compensate for variations in thickness of materials; employed or to enable the same to be employed in the construction of odd-sized forms without the use of wedges, blocking or similar expedients.

A further and'more specific object of the invention is to provide in a device of this character a construction providing a seat for a supported beam which is adjustable to various positions to compensate for variations in thickness of the material or a variation of the mold form a standard size. I

A further object of the invention is to provide in a construction of this character an adjustable beam support, which further provides an adjustment for the endmembers of the mold, permitting compensation for variations in thickness of the material or size of the. mold.

A still further object of the invention is'to provide supports for slab mold beams in combination with abeam clamp which is of such character that the slab mold beams neednot be accurately cut and may, as a matter of fact, be of less length than the actual distance between the side frames of the beam molds or boxes and at the same time the beam molds and the beams of the slab mold will be securely and firmly ment or dislodgement.

A still further object of the invention is to provide a construction of this character which may be very readily and cheaply embodied in the structure employed in my copending application above identified.

These and other objects I attain by the construction shown in the accompanying drawvention and wherein held against displace- 1928." Serial No. 224 737.

Figure 1 is a perspective View showing mold clamps constructed in accordance with my invention in use to secure a column mold;

Figure 2 is a horizontal sectional view through the engaged portions ofend and side members of the clamp when employed in this capacity;

and 11 which, for the purpose of convenionce, may be termed end and side members. The side members comprise channel iron beams which are provided in the web 12 thereof with a plurality of uniformly longitudinally spaced transversely extending slots 13 connected to one another by a centrally disposed longitudinally extending slot 14. At one end, the beam has its flanges cut-away topermi't project on of the web, as indicated at 15, and adjacent this endand inwardlyof the "ends of the flanges, the web is formed with an opening 16 of the same width as the transverse slots 13 and of a length approximating the distance between threeof said slots. The flanges 17 of the channelmember are provided adjacent the cut-away portions with longitudinally extending slotslS which are of a length approximately equal to onehalf the length of the opening 16 and have their upper ends substantially co-incident therewith.

A chair 19 is provided comprisinga U-shaped bracket having in the arms thereof aligned openings 20, one of wh ch is squared. A carriage bolt 21 is inserted through the openings 20 having the squared portion 22 of its shank engaged in the squared opening of the chair 19 whose legs abut the outer faces of the flanges 17 and is further extended through the slots of the flanges in the second opening 20 of the chair. At the inner faces of the flanges 1.7, washers 23 are mounted upon the bolt and between these ings, wherein for the purpose of illustration is shown a preferred embodiment of my in-- washers, a tubular spacer 24 surrounds the bolt. The chair seat 25 has an opening 26 formed therein for the passage of a securing element and'the web 12 of the channel is provided with perforations 27 for the same purpose.

The end' members preferably comprise H beams, the webs 28 of which may fit in the slots 14: and the flanges 29 of which are spaced apart a distance such that they may engage in-adjacent slots 13 of the channel web 12. The webs are provided adjacent each end thereof with parallel rows of longitudinally extending wedge slots 30, the slots of each row being staggered with relation to the slots of the adjacent row and each of said slots being adapted to receive a tapered wedge key 31. Each flange 29 is formed with perforations 32 for the passage of securing elements, these openings 32 being so spaced that securing elements may be simultaneously directed through a plurality thereof to engage in the upper end of a supporting beam 33 when the device is employed in the formation of a beam..

In employing the device as a column mold, an end member 10 is secured against one side of the mold and two side members engaged therewith by passing theside members over the ends of the end member with the flanges and web of the end member extending through slots 13 and 14- of the side members and slipping the keys 31 in position to engage the side members and prevent their separation from the end members.

The second end member is then passed through the. openings 16 of the side members and adjusted by shifting the bolts 21 until the end member is firmly clamped against the Wall with which it is associated. The bolts are then tightened means of wing nuts 34L. The wedge keys may be then inserted in the end member and all of the wedge keys fully tightened so that the form Willbe securely held in position. If desired, securing elements may be directed through the openings 27 and 32 of all of the elements of the complete clamp.

It will be observed that by the adjustment afforded by the bolt 21 operating in the size, this slots 18, a closer adjustment may be obtained For example, if the mold was of standard limensions but the material employed of improper adjustment will ..1G111OV any possible necessity for wedges employed between the side and end members and the frame to talre'up play. As the standard end member employed preferablyconsists of a two inch H-beain, it will be obvious that there is otherwise only a two inch adjust ment to the clamp. If the column is, there fore, -an off size, requiring an intermediate inch adjustment. this may be -taken care of a by the adjustment of the bolt 21.

In employing the device in the formation osta beam. an end member is secured to a support 33 by passing securing elements through the openings 32 into the end of the beam. The side members are then slipped over opposite ends of '"the end member with their channels outwardly disposed and secured by keys 31. These side members may be secured to the mold frame F by securing elements extending through the openings 27, if desired. The mold beams supporting the floor slab S are then seated at their ends upon the chair and may be secured thereto by directing securing elements through the openings 26. f The beam, after beine' secured, is then adjusted to the proper level by loosening-the bolt '18 and shifting the same vertically until the proper level isreached or this adjustment may be made before the beam is seated upon the chair. As set forth in any prior applicadtion, the construction of a pil'aster issimply the construction of a beam which is vertically instead of horizontally disposed and the attendant arrangement is, identical with that set forth. 1

F or convenience in bracing the beam of the floor slab S, 1 preferably pivot to the inner face of one flange of the side member adjacent the upper end thereof a brace 35, the free end of which is perforated, as at 36, for the passage'of a securing element.

. This brace, after the beam has been seated in position, is swung about its pivot 37 until it engages against the'ou-ter edge of the chair seat 25 before the securing element is inserted through the opening 36 to engage the beam. It will be obvious that since this brace connected directly to the side member, longitudinal movement of the beam with respect to the side member will be absolutely prevented as well as vertical movement of the beam with respect to this side memberr Under these circumstances, it will be obvious that the sides of the box or mold of the beam form cannot shift and there will be no necessity for cross-bracing the mold. This is a decided advantage, in

that after these molds :set up, reinforcmg iron or steel must be placed in position therein and these cross braces interfere considerably with this installation. It is a. further advantage in that it permits use of beam. consi erably shorter than the I ltwill be obvious that a device-of this character greatly facil tates the o 'ieration of scttiI-i-g up the mold and is capable of use in a great many more situations than those iling a Web and a perpendicularly related flange the side members com risin bars each having a plurality of longitudinally spaced transversely extending slots for the selective passageoi the flange of an associatedend member, alongitudnally extend-' ing slot communicating with' all of said transverse slots and adapted for the reception of the veb of the end member, each side member having in one end an opening ofthe same Width as the flange of the end members. and of greater depth than the end member,

and means adjustable upon the side member for engagement With the outer face of an end member directed through said opening.

2. A concrete form clamp including side and end members for engagement With sides and at least one end of aconcrcte form, said; clamp including end and side members, the

end members being of across section including a Web and a perpendicularly related flange, the flange being connected. to the Web its center, the side members com prising bars each having a plurality of longitudinally spaced transversely extending slots for the selective 'iassage of the flange of an assoc'ated end member, a longitudinally extending slot communicating centrally With all of said transverse slots and adapted for the reception of the Web of the end member, each sidev member having in one end an opening of the same Width as the flange of the end members and of greater depth than the end member, and means adjustable upon the side member for engagement With the outer face of an end member directed through said opening.

3. A concrete form clamp including side and end members for engagement with sides and at least one end of a concrete form, said clamp including end and side members, the

end members being of a cross section including a-web and a perpendicularly related flange, the side members comprising bars each having a plurality of longitudinally spaced transversely extending slots for the selective passage of the flange of an associ ated end member. a longitudinally extending slot communicating with all or said transverse slots and adapted for the reception of the Web of the/end member, each side member having in one end an opening of the same width as the flange of the end membcrs'and of greater depth than the end member, means adjustable upon the side memniember H-shaped in cross section and. chanber for engagement ivith the outer face of an end member directed through said opening, the Web 01 the end member having adj accnt each end thereof spaced parallel rows longtudinaily extend'i openings,,tl1e openings of each row being st; ggered with relation to the openings of the other row and webs engageabiein said openings and adapted to engage one face or" an associated side member.

4. A concrete forrn end member ltshaped in cross section and channel. iron side members, the We is of the channel iron side members having at one end lon 'itud nally spaced transverse slots for the pas. of the t e s oi? the H and a longitudinany extending lot connecting adjacent transverse slots for the reception of the eb of the H, the opposite ends otr the side members having ope) greater'depth than the H and of the same Width thereas. and means adjustable upon the side meme for engaging the outer face of an end member engaged therein;

5. A concrete formclamp including an end clamp including an nel. iron side members, the Webs of the rlr-i nel iron side members having at one end. longitudinally spaced transversely ertencmg slots for thepassage ot the flanges of the H and a loin 'tudinally extending slot connect ing adjacent transverse slot-s tor the reception of the Web of the H, the rippe iends 01 the side members havmci open (rs oi s t greater depth than the H and of the same Width thereas, the flanges of the side members at said ends being longitudinally slot ted for the passage. of a bolt. said bolt being adapted to engage the outer face of a second,

end member extended through said openings.

6. A concrete form clamp including an end member H-shaped in cross section and channel iron side members, the Webs of the chan nel iron side members having at one end longitudinally spaced transversely extendinef slots for the passage of the flanges oi? the H, a longitudinally extending slot connecting adjacent transverse slots for the reception of the Web of the H, the opposite ends or": the side members having openings of greater depth than the H and of the same Width therea's, the flanges ofthe side members at said ends being longitudinally slotted for the passageof a bolt, said bolt being adapted to engage the outer face of a second end member extended through said openings, and a chair secured to said bolt and adjustable therewith. V

7. A concrete form clamp including side and'end members for engagement With sides and at least one end of a concrete form, said clamp including end and side members. the end members being of a cross section including a Web and a perpendicularly related. flange, the side members comprising bars lv extending I each having a plurality of longitudinally spaced transversely extending slots for the selective passage of the flange ct an associated end member, a longitudinally extending slot communicating with all of said transverse slots adapted'for the reception of the web of the end member and means at corresponding ends of the side members attording transversely entendingseats projecting outwardly from the side member, and adjustable longitudinally of the side members.

8. A concrete form clamp including side and end members for engagement with sides and at least one one of a concrete form said clamp including end and side, members, the end members being of a cross section including a web and a perpendicularly related flange, the side members comprising bars each having a plurality of longitudina ly spaced transversely extending ,lots for the selective passage of the flange or an associated end member, a lon itudinally extending slot communicating with the web of the end member, means at corresponding ends of the side members afford ing transversely extending seats projeetin n outwardly from the side member tor the reception of the end of a beam and a brace pivoted to the side member and swlngable about'the pivot thereoi to engage the outer.

. member and side members having perforations at one end through which the end member may be dlrected and 1n which the end of said v transverse slots adapted for the reception ot member fits, means for securing the side members in adjusted 'positi ns upon the end member, chairs upon the opposite ends of the side members and adjustable longitudinally oi the side members and adapted to receive the ends of beams, and braces pivoted to said side members and swingable to simultaneously engage the chair and the beam supported thereby, said braces being adapted to be secured to the beam and. when secured thereto preventing relative movement of the beam and side member.

10. A concrete form clamp including end and side members, theside members having openings for the passage or the end members at one end which fit the end members and at the opposite end openings for the passage-0t the end members permitting adjustment of the end members longitudinally or the side members, and a member ad]ust-' able longitudinally of each side member. for

engaging an end member directed through the last named opening thereof.

11. A concrete form clamp including end and side members, the side members having openings for the passage of the end members at one end which lit the end members and at the opposite end openings for the passage of the end members permitting adjnstment oi the end members longitudinally oi the side members, a member adjustable longitudinally of each side member for engaging an end member directed through the last named opening thereof, and a beam chair carried by the longitudinally adjnstable member of each side member.

. 'HORACE FORD. 

